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White-light generation and OLED life...

University of Michigan.

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White-light generation and OLED lifetime issues.

Record Type:	Electronic resources : Monograph/item
Title/Author:	White-light generation and OLED lifetime issues./
Author:	Johnson, Aaron R.
Description:	189 p.
Notes:	Adviser: Jerzy Kanicki.
Contained By:	Dissertation Abstracts International69-09B.
Subject:	Engineering, Electronics and Electrical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3328856
ISBN:	9780549816249

White-light generation and OLED lifetime issues.
Johnson, Aaron R.

White-light generation and OLED lifetime issues. - 189 p.

Adviser: Jerzy Kanicki.

Thesis (Ph.D.)--University of Michigan, 2008.

This thesis presents experimental results and discussion regarding issues related to organic light-emitting devices (OLEDs). In particular, this thesis has three main focuses: the generation of white light from Forster transfer in blends of emissive polymer and methods used to characterize the efficiency of that transfer; low temperature, conformal, thin film encapsulation for organic devices; and the effect of a pulsed driving scheme on the lifetime of OLEDs. In the first research focus, a method is proposed to measure the efficiency of Forster energy transfer. The efficiency of Forster transfer has previously been studied in biological systems, but this thesis presents a method which may be used for systems of semiconducting polymers. In addition, this thesis presents a theoretical basis for comparing the efficiency of a Forster-blend-based white light emitter to a similar emitter with no Forster energy transfer in order to show that white light generation from Forster transfer does, indeed, increase emission efficiency. The latter two research efforts examine the effect of encapsulation and driving scheme on the growth rate of non-emissive dark regions in OLEDs and, as such, share similar experimental apparatus. The formation and growth of non-emissive dark regions have been a persistent problem in OLED fabrication. The results presented in this thesis show that the combination of proper encapsulation and driving method can effectively slow the growth of these non-emissive regions.

ISBN: 9780549816249Subjects--Topical Terms:

626636
Engineering, Electronics and Electrical.

White-light generation and OLED lifetime issues.
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100 1 $a Johnson, Aaron R. $3 1030512
245 1 0 $a White-light generation and OLED lifetime issues.
300 $a 189 p.
500 $a Adviser: Jerzy Kanicki.
500 $a Source: Dissertation Abstracts International, Volume: 69-09, Section: B, page: 5653.
502 $a Thesis (Ph.D.)--University of Michigan, 2008.
520 $a This thesis presents experimental results and discussion regarding issues related to organic light-emitting devices (OLEDs). In particular, this thesis has three main focuses: the generation of white light from Forster transfer in blends of emissive polymer and methods used to characterize the efficiency of that transfer; low temperature, conformal, thin film encapsulation for organic devices; and the effect of a pulsed driving scheme on the lifetime of OLEDs. In the first research focus, a method is proposed to measure the efficiency of Forster energy transfer. The efficiency of Forster transfer has previously been studied in biological systems, but this thesis presents a method which may be used for systems of semiconducting polymers. In addition, this thesis presents a theoretical basis for comparing the efficiency of a Forster-blend-based white light emitter to a similar emitter with no Forster energy transfer in order to show that white light generation from Forster transfer does, indeed, increase emission efficiency. The latter two research efforts examine the effect of encapsulation and driving scheme on the growth rate of non-emissive dark regions in OLEDs and, as such, share similar experimental apparatus. The formation and growth of non-emissive dark regions have been a persistent problem in OLED fabrication. The results presented in this thesis show that the combination of proper encapsulation and driving method can effectively slow the growth of these non-emissive regions.
590 $a School code: 0127.
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650 4 $a Engineering, Packaging. $3 1025152
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